Question 1

Johnson's rule sequences a set of jobs through two different machines or work centers in the same order.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following scheduling rules gives priority to jobs that must be done to keep shipping on schedule and tends to perform better on the average job-lateness criterion?

Accepted Answer

A)  SPT 
B)  LPT 
C)  EDD 
D)  FCFS 
E)  critical ratio 
A)  SPT 
B)  LPT 
C)  EDD 
D)  FCFS 
E)  critical ratio

Question 3

In retail outlets, customers are usually processed on a first come, first served basis. Why? Is the express lane in the supermarket an exception? Craft a sequencing rule to explain express lane behavior.

Accepted Answer

FCFS is fair. All customers are consider

Question 4

Gantt charts are useful for scheduling jobs, but not for loading them.

Accepted Answer

A) True 
 B)False

Question 5

Three jobs are to be assigned to three machines. Costs for each job-machine combination appear in the table below. Find the total cost using the assignment method.

Accepted Answer

A)  25 
B)  28 
C)  29 
D)  21 
E)  34 
A)  25 
B)  28 
C)  29 
D)  21 
E)  34

Question 6

One weakness of finite capacity scheduling is that the delivery requirements are based on a predefined rule.

Accepted Answer

A) True 
 B)False

Question 7

An approach to sequencing that can handle the situation where jobs must pass through two or more work centers in a fixed sequence is ________.

Accepted Answer

The answer of An approach to sequencing that can handle...

Question 8

Which of the following considers process capacity when scheduling?

Accepted Answer

A)  cap loading 
B)  constrained loading 
C)  capacitated loading 
D)  backward loading 
E)  finite loading 
A)  cap loading 
B)  constrained loading 
C)  capacitated loading 
D)  backward loading 
E)  finite loading

Question 9

Use Johnson's rule to determine the optimal sequencing for the seven jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2). The processing times in hours are given in the table below.
(a) What is the optimal sequence?
(b) What is the total flow time for this sequence?

Accepted Answer

(a, b) The optimal sequence is

Question 10

What is the priority rule that sequences jobs using the smallest ratio of due date from today to processing time?

Accepted Answer

A)  critical ratio 
B)  earliest due date 
C)  first come, first served 
D)  longest processing time 
E)  shortest processing time 
A)  critical ratio 
B)  earliest due date 
C)  first come, first served 
D)  longest processing time 
E)  shortest processing time

Question 11

________ cards are used to control the amount of work in a work center, aiding input-output control.

Accepted Answer

ConWIP or

Question 12

The president of a consulting firm wants to minimize the total number of hours it will take to complete four projects for a new client. Accordingly, she has estimated the time it should take for each of her top consultants-Charlie, Gerald, Johnny, and Rick-to complete any of the four projects, as follows:
   (a) What is the total number of hours required by the following arbitrary assignment?
Charlie→B; Gerald→A; Johnny→C; Rick→D
(b) What is the optimal assignment of consultants to projects? (Use the assignment method.)
(c) For the optimal schedule, what is the total number of hours it will take these consultants to complete these projects?

Accepted Answer

(a) 18 + 13 + 22 + 1

Question 13

________ is the assignment of jobs to work or processing centers.

Accepted Answer

The answer of ________ is the assignment of jobs to...

Question 14

Which of the following is NOT tracked by scheduling optimization systems used in retail stores?

Accepted Answer

A)  cars parked in the parking lot 
B)  individual store sales 
C)  transactions 
D)  units sold 
E)  customer traffic 
A)  cars parked in the parking lot 
B)  individual store sales 
C)  transactions 
D)  units sold 
E)  customer traffic

Question 15

At Morgan's Transformer Rebuilding, five jobs are ready now for dispatching to a machine center. The processing times and due dates for the jobs are given below. Use earliest due date to sequence the jobs, and calculate the average completion time, the average job lateness, and the average number of jobs in the machine center.

Accepted Answer

The EDD sequence is E-C-B-A-D.

Question 16

Eight jobs have been sequenced at a single work center. Total processing time for the eight jobs is 34 hours, and total flow time for the sequence is 85 hours. For this schedule, utilization is ________ and the average number of jobs in the system is ________.

Accepted Answer

A)  100 percent; 10.625 
B)  low; .0941 
C)  0.400 or 40 percent; 2.5 
D)  0.235 or 23.5 percent; 4.25 
E)  maximized; minimized 
A)  100 percent; 10.625 
B)  low; .0941 
C)  0.400 or 40 percent; 2.5 
D)  0.235 or 23.5 percent; 4.25 
E)  maximized; minimized

Question 17

Compare short-term scheduling at process-focused, repetitive, and product-focused facilities.

Accepted Answer

Process-focused: (1) Scheduling to custo

Question 18

The jobs listed below need to be completed. Assume that it is now day 140. If the jobs are sequenced according to the longest processing time rule, what is the average completion time?

Accepted Answer

A)  47.6 days 
B)  65.2 days 
C)  94.0 days 
D)  2.5 days 
E)  238.0 days 
A)  47.6 days 
B)  65.2 days 
C)  94.0 days 
D)  2.5 days 
E)  238.0 days

Question 19

When a set of jobs must pass through two workstations whose sequence is fixed, ________ is the sequencing rule most commonly applied.

Accepted Answer

A)  critical ratio 
B)  earliest due date 
C)  first come, first served 
D)  slack time remaining 
E)  Johnson's rule 
A)  critical ratio 
B)  earliest due date 
C)  first come, first served 
D)  slack time remaining 
E)  Johnson's rule

Question 20

Identify the major disadvantages of the Gantt load chart.

Accepted Answer

It does not account for production varia

Exam 14: Short-Term Scheduling

Johnson's rule sequences a set of jobs through two different machines or work centers in the same order.

Which of the following scheduling rules gives priority to jobs that must be done to keep shipping on schedule and tends to perform better on the average job-lateness criterion?

In retail outlets, customers are usually processed on a first come, first served basis. Why? Is the express lane in the supermarket an exception? Craft a sequencing rule to explain express lane behavior.

Gantt charts are useful for scheduling jobs, but not for loading them.

Three jobs are to be assigned to three machines. Costs for each job-machine combination appear in the table below. Find the total cost using the assignment method.

One weakness of finite capacity scheduling is that the delivery requirements are based on a predefined rule.

An approach to sequencing that can handle the situation where jobs must pass through two or more work centers in a fixed sequence is ________.

Which of the following considers process capacity when scheduling?

Use Johnson's rule to determine the optimal sequencing for the seven jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2). The processing times in hours are given in the table below. (a) What is the optimal sequence? (b) What is the total flow time for this sequence?

What is the priority rule that sequences jobs using the smallest ratio of due date from today to processing time?

________ cards are used to control the amount of work in a work center, aiding input-output control.

________ is the assignment of jobs to work or processing centers.

Which of the following is NOT tracked by scheduling optimization systems used in retail stores?

Eight jobs have been sequenced at a single work center. Total processing time for the eight jobs is 34 hours, and total flow time for the sequence is 85 hours. For this schedule, utilization is ________ and the average number of jobs in the system is ________.

Compare short-term scheduling at process-focused, repetitive, and product-focused facilities.

The jobs listed below need to be completed. Assume that it is now day 140. If the jobs are sequenced according to the longest processing time rule, what is the average completion time?

When a set of jobs must pass through two workstations whose sequence is fixed, ________ is the sequencing rule most commonly applied.

Identify the major disadvantages of the Gantt load chart.

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Eight jobs have been sequenced at a single work center. Total processing time for the eight jobs is 34 hours, and total flow time for the sequence is 85 hours. For this schedule, utilization is and the average number of jobs in the system is .